Correct version for download
I am a student from Brazil, in an University and I have already downloaded Geogebra 6.x before to use it for Geometry and Calculus. This semester, I have a specific class where the teacher asked to download version 5.x, but I looked in the website and I noticed that both version still exits. Is there any specific difference between the two versions? Shall I keep the actual version that I have installed, I mean, 6.x? Or shall I quit this and install version 5.x?
R. de Souza